Lard and oil tank



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vArena1 e HENRY HALL, OF ST. LOUIS, MISSOURI.

LARD AND OIL TANK.

SPECIFICATION forming part of Letters Patent No. 291,535. dated January 8, 1.854,

` Application le(1Fcbruary19,l83. (No model.)

To (LEZ 111710711, it may concern-.-

Be it known that I, HENRY BALL, of St.

`Louis, Missouri, have made a new :.nil useful tion of the lower end of the tank and the parts therewith connected, the upper valve being closed and t-he lower valve. open, Fig. 3, a view similar to that .of Fig. 2, both valves being open; Fig. 4, a bottom view of the upper valve, and Fig. 5 a section taken on the line 5 5 of Fig. 2. i

The same letters denote the same paris.

The present invention relates to an improved mode of constructing the bottom of the tank and the parts immediately therewith connected. L

A represents a lard, oil, or other tank in which the present improvement is embodied. Aside from the improvement,the tank is of the usual description. 'B represents the chamber in which are placed the articles from which the lard, me., is prepared. They are supported upon the conical or tapering perforated bottom C and the head or valve I). The shell a of the tank is extended below and around the bottom C, so as to inclose a space,` E, beneath and around the perforated bottom C. An opening, F, at the bottom of the tank, is made to be closed,when desired, by the valve G. The valves D and G are attached to the rod I-I, as follows: The valve G is fastened to the rod, `and this valve and rod always move together, whether the rod is lifted or lowered. The upper valve, D, is upheld by means of the shoulder 7L on the -rod Hthat is, the valve D opens downward by dropping the rod II; but as it is necessary to the operation of the improved tank to be ableto drop the lower valve, G,without at the same time necessarily dropping the upper valve, the upper valve can be upheld and the opening c in the bottom Gkept closed when the rod and lower valve are lowered,

and as follows: The upper valve is provided with lugs d d, which, when the valve is suitably turned around, come above projections t fi, which are attached-to the bottom C, and as long as the valve is thus turned it is upheld in the opening c,- but the valve D being loose on the rod l-I,the rod can be dropped through the valve D, as shown in Fig.2, and the lower valve be opened. On the other hand,when it is desired to open both valves, the rod H is turned around. The rod is squared where it engages with the valve D, and the turning around of the rod causes the valve D to be turned around, and when the valve has been turned sufficiently to bring the lugs dd out of line with the projections fit the valve D can drop with the rod II, and both valves can then be opened, as shown in Fig. 3. 'Io close the valves, the rodis lifted until the valves are seated. The rod is then rotated until the lugs d are above the projections i, as shown in Fig. 1. The lower valve is preferably seated by drawing it upward against the flange fi.- The upper valve closes the opening c by being madeto iit the wall i?, surrounding the opening c. This wall i2 is extended upward and downward, substantially as shown, to insure the seating of the upper valve as the packing gl of the lower valve wears away. The open'l ing F, in diameter, is largerthan the opening c, to provide for the passage of the lugs d d. The parts i i arc preferably in one piece, I, which is fastened to both the bottom G and the shell a, and made to support the bottom C at the center. i

In operation the tank is filled in the ordinary inanner, and the charge rests upon the' perforated bottom C and valve D. The steam used in cooking the charge is introduced into the space 13, being delivered thereinto through the inlet fi, which is conveniently formed in the part I. It is an advantage, also, to have the steam enter the tank at the bottom thereof. By reason of the shape of the space E, the steam can pass upward and enter the chamber B well above the level of the valve D, thus providing a freer access to the charge within the chamber B. In cooking the change, the usual water of condensation collects in the chamber B, and to be able to readily dispose e espinas of it is an aim and advantage of the improvement. By opening the lower valve, G, and keeping the upper valve closed, as in Fig. 2, the watereau tlow downward through the perforations c c in the bottom G and through the opening F without any difficulty arising from the choking of any valve-opening. Heretofore, as lard-tanks have been made, the residue from the tank has been liable to drop and choke the valve-opening` when the valve was opened to discharge the water; but in this tank the residue is upheld by the upper valve during the draining-ot' the water. The residue can also be washed in the same manner-that is, after the water oi" condensation has been withdrawn and the lard drawn ott', (which is done in the usual manner, and through the usual cocks in the tank, but which are not shown in the drawings,) water can be introduced into the upper part ot' the chamber B and allowed to run down through the residue, the openingsc c, the space E, and opening F, and the residue thereby be cleaned. A1- ter the residue is ready to be discharged from the chamber B, the upper valve is opened, as well as the lower valve, substantially as sho-wn in Fig.3,and the residue is discharged through the openings c F. The projections t' on top are slightly beveled, (not sho\vn,) the aim and effect of which is, as the upper valve is turned around to seat it, to cause the valve to be lifted slightly, and suticiently to cause the valve, when seated, to be supported by the part I, and not by the shoulder 7L upon the valve-rod. This is desirable to enable the rod to be more readily operated.

The valve D may, to discharge the water of condensation and to admit the steam, have iine perforations, similar to the peri'brations 4o c in the bottom C.

l. A lard or oil tank having an inner and an outer bottom, each separate from the other, the inner bottom being perforated and the outer bottom being imperforated, and each bottom having for the discharge of the residue an opening in its lower end capable of being closed by a valve, and the valve in the outer bottom capable ot' being opened and closed independently ofthe valve in theiuner bottoni, for the purpose described.

2. A lard or oil tank having the perforated tapering bottom C, the valve D, the closed tapering bottom a, independent of the bottom C, and having the valve G- and the rod H, substantially as described.

` The combination of the bottom C, the valve D, having the lugs d d, the projections i 1.', the bottom a, the valve G, and the rod H, substantially as described.

4. The combination ot' the bottom C, the valve D,having thelugs d d, the part I,having` the projections z' i', and the seats i i2, the valve G, and the rod H, substantially as described.

5. The combination of the bottom C, the valve D, the lugs d d, the projections fi z', the valve G, and the rod H, said rod being squared to rotate said valve D, and having ashoulder, /L,to lift said valve D,substantially a's described.

6. A lard or oil tank having an inner perforated bottom above the outer bottom, said inner, as well as the outer, bottom also having an opening closed by a valve, for the diseharge,when desired,of the residue downward from the tank.

HENRY BALL.

Vitnesses:

G. D. MOODY, A'UGUsTUs C. RALL. 

